CN203574625U - Solid state relay (SSR) - Google Patents
Solid state relay (SSR) Download PDFInfo
- Publication number
- CN203574625U CN203574625U CN201320636980.5U CN201320636980U CN203574625U CN 203574625 U CN203574625 U CN 203574625U CN 201320636980 U CN201320636980 U CN 201320636980U CN 203574625 U CN203574625 U CN 203574625U
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- Prior art keywords
- circuit
- state relay
- solid state
- control circuit
- switching
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- Expired - Fee Related
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Abstract
The utility model discloses a solid state relay (SSR). The solid state relay is a four-terminal active device, and comprises two input terminals and two output terminals. A control circuit, an electric isolation unit, a drive circuit and a switching circuit are arranged between the two input terminals and the two output terminals, wherein the control circuit is connected with the input terminals; the control circuit, the electric isolation unit, the drive circuit and the switching circuit are sequentially connected; and the switching circuit is connected with an output circuit. The solid state relay has a small di/dt ratio and stable starting performance, exerts small radiation interference to a power grid, can reduce the counter electromotive force of an inductive load when the solid state relay is switched off, can provide certain protection of both an electrical device and the solid state relay, has no contacts and generates no sparks, and thus fulfills a purpose of controlling and disconnecting a circuit and switching on the electrical device.
Description
Technical field
The utility model relates to a kind of relay, in particular a kind of solid-state relay.
Background technology
Solid-state relay Solid State Relay, SSR, it is a kind of noncontacting switch device that modern microelectric technique and Development of Power Electronic Technology are got up, by solid-state electronic element, formed, utilize electronic building brick (as switch triode, the semiconductor subassemblies such as bidirectional triode thyristor) switching characteristic, reach contactless, no-spark, and the object of energy make-and-break contact, therefore " noncontacting switch " is otherwise known as, solid-state relay is except having the function the same with electromagnetic relay, also there is logical circuit compatibility, the resistance to resistance to mechanical shock of shaking, installation site is unrestricted, long service life, contactless, no-spark, noiselessness, without electromagnetic interference, switching speed is fast, antijamming capability is strong, reliable operation, volume is little.With the control signal of pettiness, reach direct driving large current load, there is good moistureproof and mildewproof Corrosion Protection, explosion-proof and prevent that the performance aspect ozone pollution is also splendid, it is little that solid-state relay also has input power, highly sensitive, power ratio control is little, and Electro Magnetic Compatibility is good, the low and operating frequency high of noise.
Solid-state relay has been widely used in computer external interface arrangement, heating by electric cooker constant temperature system, numerical controlled machinery, remote control system, industrial automation arrangement at present; Signal lamp, scintillator, illumination stage light control system; Instrument and meter, medicine equipment, photocopier, automatic washing machine; Automatic fire control, security system, and as diverter switch of the electric capacitor of grid power factor compensation etc., in, anticorrosion occasion explosion-proof, moistureproof at need such as chemical industry, collieries, solid-state relay has a large amount of uses in addition.Existing product useful life short, relay do not discharge bad, volume is large, a little less than antijamming capability.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of solid-state relay is provided, and can reach contactless, no-spark, and can control the object of open circuit and connection electrical equipment.
The utility model is achieved through the following technical solutions: solid-state relay of the present utility model is four end active devices, comprise two input terminals and two lead-out terminals, between two input terminals and two lead-out terminals, control circuit, electrical isolation unit, drive circuit and switching circuit are set, control circuit is connected with input terminal, control circuit, electrical isolation unit, drive circuit are connected successively with switching circuit, and switching circuit is connected with output circuit.
As one of optimal way of the present utility model, described electrical isolation unit is photoelectrical coupler.
The utility model has the following advantages compared to existing technology: the ratio that the utlity model has current changing rate di/dt is little, startability steady, little to electrical network radiated interference, can reduce the back electromotive force of inductive load while turn-offing, electrical appliance and solid-state relay are had to the advantages such as certain protective effect; contactless, no-spark can be reached, and the object of open circuit and connection electrical equipment can be controlled.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below embodiment of the present utility model is elaborated; the present embodiment is implemented under take technical solutions of the utility model as prerequisite; provided detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
As shown in Figure 1, the solid-state relay of the present embodiment is four end active devices, comprise two input terminals 1 and two lead-out terminals 2, between two input terminals 1 and two lead-out terminals 2, control circuit 3, electrical isolation unit 4, drive circuit 5 and switching circuit 6 are set, control circuit 3 is connected with input terminal 1, control circuit 3, electrical isolation unit 4, drive circuit 5 and switching circuit 6 are connected successively, and switching circuit 6 is connected with output circuit.
The function of control circuit 3 provides a direct current or pulse signal to exactly drive circuit 5; Electrical isolation unit 4 is the switching devices with the media transmission signal of telecommunication, is used for isolating high-frequency circuit and low-frequency channel; The high-frequency signal that high-frequency circuit produces can disturb low-frequency channel, and electrical isolation unit 4 can connect two parts can shield again high-frequency signal; The little current signal that drive circuit 5 provides circuit amplifies and offers switching circuit 6 high power devices; Switching circuit 6 adopts controllable silicon or high power transistor to switch on and off load current.
Between input and output, be electrical isolation, add that direct current or arteries and veins portion signal are after certain value on input, output can change on-state into from off-state.
Claims (2)
1. a solid-state relay, it is characterized in that, described solid-state relay is four end active devices, comprise two input terminals (1) and two lead-out terminals (2), control circuit (3), electrical isolation unit (4), drive circuit (5) and switching circuit (6) are set between two input terminals (1) and two lead-out terminals (2), control circuit (3) is connected with input terminal (1), control circuit (3), electrical isolation unit (4), drive circuit (5) and switching circuit (6) are connected successively, and switching circuit (6) is connected with output circuit.
2. solid-state relay according to claim 1, is characterized in that, described electrical isolation unit (4) is photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320636980.5U CN203574625U (en) | 2013-10-15 | 2013-10-15 | Solid state relay (SSR) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320636980.5U CN203574625U (en) | 2013-10-15 | 2013-10-15 | Solid state relay (SSR) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203574625U true CN203574625U (en) | 2014-04-30 |
Family
ID=50542333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320636980.5U Expired - Fee Related CN203574625U (en) | 2013-10-15 | 2013-10-15 | Solid state relay (SSR) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203574625U (en) |
-
2013
- 2013-10-15 CN CN201320636980.5U patent/CN203574625U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20151015 |
|
| EXPY | Termination of patent right or utility model |